I just noticed that many of the products have been updated just yesterday. I am about to download them and install them all, including the Synchron Player. I see also updates for Synchron Pianos, VEPPro 7 (also 6), and even the VI Pro. Let's see if these updates will fix the issue.
[EDIT] I have updated all of the above products with their latest versions. I still am experiencing performance issues. I have set the Database preload time to 4096 (that was the default anyway), I've also tried 8192 but with the same results so I went back down. The speed indicated there is 98.5 MB/s. Under Engine, I have set the Preload Size to 8192 samples. The Streaming and the Loading Threads are at their default values of 4. I've tried placing them at 6 yesterday but it didn't make any difference.
I also wonder why the speed to the volume path is different than my BlackMagic Design Speed Test diagnostic app reports which is 380-390 MB/s read & write.
I am hosting the Synchorn Player within Cubase 10.5. I am going to try hosting the instruments within VEP Pro 7 and see if that handles things better.